Adjustable clevis



Patented Jan. 26, 1926.

UNITED STATES PATENT OFFICE.

SAMUEL C. LAVENDER, OF PICKENS,. OKLAHOMA, ASSIGNOR OF ONE-FOURTH TO ROBERT W. CASE, OF WRIGHT CITY, OKLAHOMA.

ADJUSTABLE CLEVIS.

Application filed November 15, 1922. Serial No. 601,185.

To all whom it may concern:

Be it known that I, SAMUEL G. LAVENDER, a citizen of the United States, residing at Pickens, in the county of Pushmataha and State of Oklahoma, have invented certain new and useful Improvements in Adjustable Clevises, of which the following is a specifieation, reference being had therein to the accompanying drawing.

This invention relates to certain new and useful improvements in plows and more particularly to the draft appliance thereof, the object being to provide a plow with an adjustable clevis which can be adjusted by the operator when the plow is in use without stopping the plow so thatthe plow can be adjusted to run at any desired depth.

Another object of my invention is to provide a draft appliance which is exceedingly simple and cheap in construction and one which is positive in operation.

Gther and further objects and advantages of the invention will be hereinafter set forth and the novel features thereof defined by the appended claim.

In the drawings,

Figure 1 is a side elevation of a portion of a beam of a plow showing the application of my improved construction of draft appliance;

Figure 2 is a top plan view;

Figure 3 is a. section through the plow beam showing the rack wheel secured there to; and

Figure 4 is a detail view of the rack showing the detent for locking the handle in adjusted position.

In carrying out my invention I employ a beam 1 herein shown I-shape in cross section, to the end of which is connected a pair of plates 2 and 3 by bolts 4. Pivotally mounted between the plates 2 and 3 is a clevis 5' which is provided with, a reduced portion 6 having a rack 7 adapted to'be engaged by a gear 8 carried by a shaft 9 mounted in a suitable bearing 10 at its forward end.

Secured to the rear end of the beam is a rack wheel 11 provided with a central hub 12 through which the shaft 9 extends, said shaft being provided with a handle 13 for rotating the same. The rack wheel 11 is provided with an extension 14: conforming in shape to the cross section of the beam 1 and is secured thereon by a bolt 15 as clearly shown in Figure 3 so as to securely clamp the rack wheel in position.

The handle 13 carries-a pivoted spring detent 16 adapted to engage the rack wheel 11 and by grasping the handle the detent will be moved out of engagement with the rack wheel so that the shaft 9 can be rotated in order to adjust the pivoted clevis 5 and when the handle is released, the detent is thrown into engagement with the rack wheel 11 so as to lock the shaft in its adjusted position, which it turn through the medium of the gear and the segmental rack 7 looks the clevis in its adjusted position and as the shaft extends to the rear end of the beam between the handles and in close proximity thereto, the operator of the plow can readily adjust the clevis as he plows.

From the foregoing description it will be seen that I have provided an adjustable draft appliance for a plow which can be readily attached to any of the well known plows now in use as the rack wheel is capable of being secured to the beam at any desired point.

What I claim is pair of forwardly extending plates adapted to be secured to the oposite sides of a plow beam at its forward end, a clevis pivotally mounted between said plates adjacent their free ends having a reduced portion provided with a segmental rack, a rack wheel having extensions conforming in shape to the beam and adapted to embrace the beam at the rear end thereof, means for securing said exten- A draft appliance for plows comprising a sions to said beam, said rack wheel being provided with a hub, a shaft having a crank mounted in said hub, a bearing on said beam in which the forward end of said shaft is mounted, a pinion carried by said shaft engaging the segmental raek of said clevis and a pivoted spring-actuated detent carried by the crank of said shaft adapted to engage said rack wheel for locking said clevis in adjusted position.

In testimony whereof I hereunto aflix my signature.

SAMUEL G. LAVENDER. 

